In recording a memorandum of agreement, the Commissioner shall cause the same to be entered in a register in Form R and shall cause an endorsement to be entered under his signature on a copy of the memorandum to be retained by him in the following terms, namely:
" THIS MEMORANDUM OF AGREEMENT BEARING SERIAL NO OF 19__.., IN THE REGISTER HAS BEEN RECORDED THIS _____ DAY OF_______
Sd
Commissioner"
Form R - Rule 52 : Register of Agreements to be maintained by the Commissioner